LuaLS / LuaLS/lua-language-server
does not warn when insert an element with a wrong type into a string array
Open
Nobody has claimed this yet.
enhancement
feat/type check
- Dominant language
- Lua
- Stars
- 4.4k
- Forks
- 442
- PR merge metrics
- No merged PRs in 30d
Description
How are you using the lua-language-server?
Visual Studio Code Extension (sumneko.lua)
Which OS are you using?
Windows
What is the issue affecting?
Diagnostics/Syntax Checking
Expected Behaviour
the code:
---@type string[]
local test = {}
table.insert(test, 123) -- should warn me when i try to insert an element with a wrong type
Actual Behaviour
does not warn

Reproduction steps
- goto vscode
- install the latest version of the plugin
- new a lua file with the code below
---@type string[]
local test = {}
table.insert(test, 123) -- should warn me when i try to insert an element with a wrong type
- there is no warnings
Additional Notes
No response
Log File
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the diagnostic issue in a Lua file using the shown table.insert example in the Visual Studio Code extension. Trace the table.insert type-checking entry point and verify that inserting 123 into a string[] produces a warning, then rerun the same reproduction to confirm the diagnostic.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- lua
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 48/100